Table 1.

Characteristics of studies evaluating the effects of TGF-β1 polymorphisms on DM risk

First author, year	Ethnicity	DM				Controls				M allele (%)		HWE
		MM	MN	NN	Total	MM	MN	NN	Total	Case	Control	P
TGF-β1 codon 10 C/T1
Tsiavou, 20044	Caucasian	9	11	12	32	7	24	8	39	45.3	48.7	0.351
Buraczynska, 20074	Caucasian	126	224	153	503	76	181	143	400	47.3	41.6	0.387
Javor, 20103	Caucasian	17	56	75	148	27	71	41	139	30.4	44.9	0.931
Jahromi, 20103	Caucasian	78	208	102	388	75	80	74	229	46.9	50.2	< 10-4
El-Sherbini, 20134	Caucasian	10	50	39	99	3	27	68	98	34.3	35.1	0.332
Bazzaz, 20143	Caucasian	39	126	83	248	15	57	47	119	41.1	36.5	0.383
TGF-β1 codon 25 G/C2
Tsiavou, 20044	Caucasian	26	6	0	32	35	4	0	39	90.6	94.9	0.945
Javor, 20103	Caucasian	137	11	0	148	117	22	0	139	96.3	92.1	0.599
El-Sherbini, 20134	Caucasian	79	20	0	99	81	9	8	98	89.9	87.2	< 10-4
Bazzaz, 20143	Caucasian	201	44	3	248	97	21	1	119	90	90.3	0.905

¹C/T = M/N;

²G/C = M/N;

³Type 1 diabetes;

⁴Type 2 diabetes.